KR20090096903A - High definition radio - Google Patents

Abstract

A digital radio in which a television program is stored is provided to download and sore broadcasting contents which is not stored by receiving error when storing desired broadcasting program. A tuner(11) tunes the high frequency signal at the broadcasting channel signal. An analog front end(12) converts the broadcasting channel signal of tuner into the digital signal. A DSP(Digital Signal Processor)(13) demodulates the digital signal into the audio signal. A DSP(Digital Signal Processor) outputs the audio signal. An MCU(Micro Controller Unit)(15) controls DSP. A memory(14) stores an algorithm and the necessary received data in the operation of DSP. A memory card stores the television program and additional information of the audio signal.

Description

Digital radio {HIGH DEFINITION RADIO}

1 is a block diagram of a digital radio according to an embodiment of the present invention.

2 is a flowchart of a digital radio according to an embodiment of the present invention.

3 is a diagram illustrating a frame of a digital radio according to an embodiment of the present invention.

4 is a diagram illustrating data storage of RAM and SD card of a digital radio according to one embodiment of the present invention;

* Description of the symbols for the main parts of the drawings *

11; Tuner 12; Analog Front End

13; Digital signal processor 14; Memory

15; Micro control unit 16; Memory card

17; Internet card

The present invention relates to a digital radio.

In general, digital radio (HIGH DEFINITION RADIO), unlike analog radio, is a receiver that can receive and display various reception services such as excellent reception sensitivity, CD level sound quality, weather, traffic condition, news headline and so on.

The digital radio may simply receive and output a broadcast, store desired broadcast content during the reception, and reproduce the stored broadcast content.

In addition, the digital radio stores only the information of a desired broadcast content during the broadcast reception and transmits the information of the stored broadcast content using a separate device (for example, an iPod) capable of bidirectional communication, and the other device is connected to a computer. Therefore, the contents corresponding to the information of the broadcasting contents can be downloaded, stored, and played back from a broadcasting station through the Internet running on the computer.

However, if the user wants to store the desired broadcast contents during the reception, the broadcast contents are stored from the beginning of the storage. In this case, all the savings are stored regardless of whether there is an error in the reception state. There is a problem.

In addition, when the broadcast is not stored due to a bad reception during the storage, the entire broadcast is downloaded and stored using another device capable of separate two-way communication, and thus only the broadcast content which is not stored due to the bad reception cannot be found and stored. There is a problem.

The present invention downloads and stores only broadcast contents which are not stored due to poor reception as well as broadcasts before storing when desired broadcasting is stored during reception.

An embodiment of the present invention includes a tuner for tuning a high frequency signal to a broadcast channel signal;

An analog front end converting the broadcast channel signal of the tuner into a digital signal;

A digital signal processor for demodulating the digital signal converted at the analog front end into an audio signal and storing and outputting the demodulated audio signal;

A micro control unit for controlling the digital signal processor;

A memory for storing algorithm storing and receiving data necessary for the operation of the digital signal processor;

A memory card for storing broadcast contents and additional information of an audio signal processed by the digital signal processor;

An internet card for connecting the digital signal processor to an internet network; And the digital signal processor stores a tag of the stored broadcast content when determining that the received broadcast content is stored, and determines whether a frame error of the stored broadcast content occurs, and when the frame error occurs, the broadcast content corresponding to the generated frame error. It only involves receiving and processing.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a digital radio according to an embodiment of the present invention, FIG. 2 is a flowchart of a digital radio according to an embodiment of the present invention, and FIG. 3 is a frame example of a digital radio according to an embodiment of the present invention. 4 is a diagram illustrating data storage of a RAM and an SD card of a digital radio according to an embodiment of the present invention.

The tuner 11 tunes and outputs a high frequency signal inputted to a selected channel broadcast signal. The tuner 31 includes an input tuner, an MLPEL integrated circuit, and a demodulation circuit.

The analog front end 12 converts the analog signal tuned from the tuner 11 into a digital signal, and the analog front end 12 includes an analog / digital converter.

The digital signal processor 13 selects a broadcast channel to the tuner 11 and demodulates the digital signal of the analog front end 12 into an audio signal.

In addition, the digital signal processor 13 stores the tag of the stored broadcast content when the received broadcast content is stored, and determines whether a frame error of the stored broadcast content occurs. The broadcast content corresponding to the tag of the frame error is received.

The memory 14 includes a ROM storing an algorithm required for the operation of the digital signal processor 13 and a RAM temporarily storing information received from the digital signal processor 13.

The RAM includes an existing code containing original code for executing a program and a data storage portion for storing broadcast content before the storage command to perform a broadcast storage command.

The RAM stores a buffering operation of overwriting new data from the oldest data, and the ring buffer stores a memory address for managing what is stored where and the data storing portion.

The micro control unit 15 controls the signal input from the set to control the digital signal processor 13 with the controlled signal.

The memory card 16 stores broadcast contents selected and processed by the digital signal processor 13, and the memory card 16 includes an SD card.

The Internet card 17 is connected to the server of the broadcasting station to the Internet to transmit and receive data, and includes a computer capable of connecting to the Internet through a wired or wireless LAN card and USB.

In an embodiment of the present invention, broadcast contents (album information, singer, song title), etc., which are broadcasted with information of contents distinguished from other broadcasts, may be transmitted and displayed together from a broadcasting station. It is divided into (frame) units and broadcasts over the airwaves and the Internet.

That is, the broadcast content uses a dedicated codec according to the broadcast method used, and the information content is framed in the one frame as the minimum unit of the frame as shown in FIG. 3. It is broadcasted in a number, an error check code for checking frame errors, a broadcast tag describing the contents, and a main audio information structure.

In addition, the broadcast tag is additional information on the content being broadcasted, and in the case of music, a structure such as tag ID, title, singer, album, date, genre, description, compression method, file size, playing time, and association with other tags To be broadcast.

The contents broadcasted by the broadcasting station and the contents stored in the Internet server are classified into the same tag as above, and the contents are searched with the information even when searching. The format will be saved.

When a broadcast signal having such contents is input from the broadcasting station to the tuner 11 through an airwave antenna, the tuner 11 converts the input broadcast signal into an intermediate frequency signal, and digitally through the analog front end 12. The signal is converted into a baseband and input to the digital signal processor 13.

The digital signal processor 13 reads a program stored in a ROM, stores the program in a RAM, executes the demodulated digital signal of the input baseband into an audio signal, and executes a digital / analog converter (ADC). After converting into an analog signal, an audio signal and additional information such as title, artist, album, date, genre, description, compression method, file size, and playback time are output.

In this case, the digital signal processor 13 performs an error correction function, a voice decoder function, and the like of the frame, and is controlled by a signal input from the micro control unit 15.

The micro control unit 15 is operated by channel up / down, voice up / down, search, and mute signals input from the set through the uART.

In the state of receiving a broadcast signal as described above, it is determined whether a broadcast signal storage command is input to the digital signal processor 13 from the micro control unit 15 (step 21). While not outputting the broadcast signal, the broadcast tag and the content being broadcasted are heard as shown in FIG. 3 (step 22).

Subsequently, if there is a broadcast signal storage command, it is determined whether there is a broadcast tag in the received broadcast (step 23). If there is no broadcast tag at this time, regardless of the storage command, the program continues to store the information as it is currently being broadcast. Is stored in the memory card 16 (step 24).

However, if there is the broadcast tag, the digital signal processor 13 stores the currently broadcast content and broadcast tag in the memory card 16 (step 25), and the RAM as shown in FIG. In addition to storing the previously stored broadcast contents having the same broadcast tag as the current broadcast tag stored before the save command in the RAM in the memory card 16, the broadcast contents received in the RAM thereafter also continue. Save it.

The digital signal processor 13 determines whether a frame error has occurred in the broadcast signal due to poor reception while storing the broadcast signal (step 26). If the frame error has not occurred, the complete broadcast content is stored in the memory. To the card 16 (step 27).

On the other hand, if a frame error occurs in broadcast content due to the reception failure, the digital signal processor 13 determines whether bidirectional communication is possible (step 28), and if bidirectional communication is not possible at this time, as shown in FIG. Then, an error is displayed on the corresponding frame in which the error has occurred and stored in the memory card 16 in an incomplete state (step 29).

At this time, the broadcast content storage in the memory card 16 is stored in the received broadcast content while determining whether a frame error occurs regardless of whether the bidirectional communication is possible.

On the other hand, if the bidirectional communication is possible, the digital signal processor 13 accesses a server (broadcasting station) through the Internet card 17 to read and analyze the broadcast contents stored in the memory card 16, Accordingly, the frame in which the error occurs among the incomplete contents is retrieved from the server stored with the same contents (step 30).

Then, the retrieved broadcast contents are retransmitted through the Internet card 17, and the digital signal processor 13 converts incomplete broadcast contents to the memory card 16 into complete broadcast contents (step 31), and the memory card 16 ) The complete contents (step 32).

The above description is merely illustrative of the technical aspects of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to an embodiment of the present invention, when a desired broadcast content is stored in a digital radio capable of audio output or storage of a received broadcast signal, the broadcast content and the currently received broadcast content are stored as well as during broadcast reception. Save the frame of the error broadcasting contents, and access the server where the error broadcasting contents are stored such as the broadcasting received through the internet card, search only the broadcasting contents in which the error occurred, and then download the broadcasting contents. By storing it, the complete broadcast content can be stored.

Claims (7)

A tuner for tuning high frequency signals to broadcast channel signals; An analog front end converting the broadcast channel signal of the tuner into a digital signal; A digital signal processor for demodulating the digital signal converted at the analog front end into an audio signal and storing and outputting the demodulated audio signal; A micro control unit for controlling the digital signal processor; A memory for storing algorithm storing and receiving data necessary for the operation of the digital signal processor; And a memory card for storing broadcast contents and additional information of an audio signal processed by the digital signal processor. An internet card for connecting the digital signal processor to an internet network; And the digital signal processor stores a tag of the stored broadcast content when determining that the received broadcast content is stored, and determines whether a frame error of the stored broadcast content occurs, and when the frame error occurs, the broadcast content corresponding to the generated frame error. Digital radio to receive and process only. 2. The digital signal processor of claim 1, wherein the digital signal processor determines whether there is a storage command for storing the received broadcast content. If there is no storage command, the digital signal processor determines whether there is a broadcast tag. A digital radio that stores both the current broadcast and the broadcast prior to a save command in both memory and memory card. The digital radio of claim 2, wherein the digital signal processor stores the broadcast tag in a memory card when the broadcast tag is present. The digital radio of claim 1, wherein the digital signal processor stores a broadcast content in a memory card while determining whether there is a frame error or whether bidirectional communication is possible. The digital radio of claim 4, wherein the digital signal processor retrieves, downloads, and stores the frame error broadcast contents stored in the memory card from a server in which the same broadcast contents are stored through bidirectional communication, when the bidirectional communication is possible. The digital radio of claim 1, wherein the memory card is an SD card. The digital radio of claim 1, wherein the Internet card is connected to a computer capable of internet using either a wired or wireless LAN card.

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